Suppose one were to mekadesh a woman using a valuable coin that is literally worth less than a perutah, but the same coin technically carried an additional value.
For example: a 1943 1 cent Lincoln steel penny can literally be used as 1 cent... but technically also has a value of $1,625.
If one were to use such a coin to mekadesh a woman would the kiddushin be valid?
Namely, if a person specified this 1 cent coin that WOULD NOT be halachically valid, can we say that since the coin ALSO carries an additional value that is significantly more than a perutah that the kiddushin WOULD be valid?
(a bit similar to this question but def not the same. That question emphasizes the stipulation, this question emphasizes the difference in value and how one of the values would halachically be invalid)